Computer Hardware User Manual
ASUS P5LD2-FM/DH/VP 1-19
1.7.3 Interrupt assignment s
IRQ Standard Function
0 System Timer
1 Keyboard Controller
2 Re-direct to IRQ#9
4 Communications Port (COM1)*
5 IRQ holder for PCI steering*
6 Floppy Disk Controller
7 Printer Port (LPT1)*
8 System CMOS/Real Time Clock
9 IRQ holder for PCI steering*
10 IRQ holder for PCI steering*
11 IRQ holder for PCI steering*
12 PS/2 Compatible Mouse Port*
13 Numeric Data Processor
14 Primary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
A B C D E F G H
PCI slot 1 — — — — — shared — —
PCI slot 2 — — — — — — shared —
PCI Express x16 slot shared — — — — — — —
PCI Express x1 slot shared — — — — — — —
Onboard USB controller 1 — — — — shared — — —
Onboard USB controller 2 — shared — — — — — —
Onboard USB controller 3 — — shared — — — — —
Onboard USB controller 4 — — — shared — — — —
Onboard USB 2.0 controller — — — — shared — — —
Onboard IDE port — — — shared — — — —
Onboard HD audio — — — shared — — — —
Onboard LAN — shared — — — — — —
When using PCI cards on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments. Otherwise,
conicts will arise between the two PCI groups, making the system
unstable and the card inoperable.
IR Q a ssi gnments fo r t his mo the rbo ard
Standard interr upt as signm ent s